How to Write a Sample letter

This is the letter to convey my apology to the employer who have been working for the past 18 years for laming him that he has stolen the money. First of all I should regret for my behaviour and I regret for it in a very precise manner. We have wrongly blamed you that you are the person who theft the money from the office. But later we came to know that the person is not you. As a Manager of this company I strongly apologise you. I don’t have any other way to convey my apology. So I request you to hear my sorry and consider me once to you get back to your work and I promise that I will not let any other moment to get worse like this.